An arcsecond is a fascinating unit of angular measurement used extensively in astronomy and geodesy. To grasp its minuteness, consider that an arcsecond is 1/3600th of a degree, and there are 360 degrees in a full circle. For practical perspective, the apparent size of a U.S. dime viewed from about 4 kilometers (or 2.5 miles) away roughly equals an arcsecond.
In the realm of astronomy, arcseconds are crucial for measuring celestial events and distances. The Hubble Space Telescope’s resolution power is often celebrated for its ability to distinguish details as tiny as about 0.05 arcseconds—akin to seeing a bumblebee 800 kilometers away! This unit’s precision is vital for understanding the cosmos, from determining stellar positions to mapping distant galaxies.
The gradian, also known as a gon, is a fascinating and less commonly used unit of angular measurement. It divides a circle into 400 equal parts, unlike the more familiar degrees or radians. Interestingly, its use is more prevalent in surveying and engineering because it simplifies calculations—each right angle is exactly 100 gradians.
The gradian was introduced during the French Revolution as part of the metric system’s attempt to decimalize units of measurement. Though it didn’t gain widespread adoption, gradian remains a testament to innovative efforts in standardizing measurements. Its legacy continues, offering an intriguing alternative for those looking to simplify complex angular calculations or explore history’s impact on our mathematical tools.
Arcseconds | Gradians |
---|---|
0
arcsec
|
0
grad
|
50
arcsec
|
0.0154321
grad
|
100
arcsec
|
0.0308642
grad
|
150
arcsec
|
0.0462963
grad
|
200
arcsec
|
0.0617284
grad
|
250
arcsec
|
0.0771605
grad
|
300
arcsec
|
0.0925926
grad
|
350
arcsec
|
0.108025
grad
|
400
arcsec
|
0.123457
grad
|
450
arcsec
|
0.138889
grad
|
500
arcsec
|
0.154321
grad
|
550
arcsec
|
0.169753
grad
|
600
arcsec
|
0.185185
grad
|
650
arcsec
|
0.200617
grad
|
700
arcsec
|
0.216049
grad
|
750
arcsec
|
0.231481
grad
|
800
arcsec
|
0.246914
grad
|
850
arcsec
|
0.262346
grad
|
900
arcsec
|
0.277778
grad
|
950
arcsec
|
0.29321
grad
|
1000
arcsec
|
0.308642
grad
|
1050
arcsec
|
0.324074
grad
|
1100
arcsec
|
0.339506
grad
|
1150
arcsec
|
0.354938
grad
|
1200
arcsec
|
0.37037
grad
|
1250
arcsec
|
0.385802
grad
|
1300
arcsec
|
0.401235
grad
|
1350
arcsec
|
0.416667
grad
|
1400
arcsec
|
0.432099
grad
|
1450
arcsec
|
0.447531
grad
|
1500
arcsec
|
0.462963
grad
|
1550
arcsec
|
0.478395
grad
|
1600
arcsec
|
0.493827
grad
|
1650
arcsec
|
0.509259
grad
|
1700
arcsec
|
0.524691
grad
|
1750
arcsec
|
0.540123
grad
|
1800
arcsec
|
0.555556
grad
|
1850
arcsec
|
0.570988
grad
|
1900
arcsec
|
0.58642
grad
|
1950
arcsec
|
0.601852
grad
|
2000
arcsec
|
0.617284
grad
|
2050
arcsec
|
0.632716
grad
|
2100
arcsec
|
0.648148
grad
|
2150
arcsec
|
0.66358
grad
|
2200
arcsec
|
0.679012
grad
|
2250
arcsec
|
0.694444
grad
|
2300
arcsec
|
0.709877
grad
|
2350
arcsec
|
0.725309
grad
|
2400
arcsec
|
0.740741
grad
|
2450
arcsec
|
0.756173
grad
|
2500
arcsec
|
0.771605
grad
|
2550
arcsec
|
0.787037
grad
|
2600
arcsec
|
0.802469
grad
|
2650
arcsec
|
0.817901
grad
|
2700
arcsec
|
0.833333
grad
|
2750
arcsec
|
0.848765
grad
|
2800
arcsec
|
0.864198
grad
|
2850
arcsec
|
0.87963
grad
|
2900
arcsec
|
0.895062
grad
|
2950
arcsec
|
0.910494
grad
|
3000
arcsec
|
0.925926
grad
|
3050
arcsec
|
0.941358
grad
|
3100
arcsec
|
0.95679
grad
|
3150
arcsec
|
0.972222
grad
|
3200
arcsec
|
0.987654
grad
|
3250
arcsec
|
1.00309
grad
|
3300
arcsec
|
1.01852
grad
|
3350
arcsec
|
1.03395
grad
|
3400
arcsec
|
1.04938
grad
|
3450
arcsec
|
1.06481
grad
|
3500
arcsec
|
1.08025
grad
|
3550
arcsec
|
1.09568
grad
|
3600
arcsec
|
1.11111
grad
|
Conversion | Call to Action |
---|---|
Arcseconds to Radians | Go to converter |
Arcseconds to Degrees | Go to converter |
Arcseconds to Arcminutes | Go to converter |